ULN2803A / Ic vs Vsat

Hello Nagai-san,

From the Figures, it looks like on the order of 0.6 to 0.7V. Do you need more precise data? This will take till the end of the week to acquire as I will have to re-run this test on the bench.

Best,
Michael

Nagai-san,

Also expect about a -2mV/C temperature coefficient for the low current VOUT.

Hello Michael-san , Ronald-san ,

Thank you for your reply.
Our customer want to know the information about Vce(sat) in Ic=0.5mA to 3mA.
If you could, we want to know tolerance of Vce(sat), min and max.

Regards,
Nagai

Ronald-san,

Thank you for answer.

>> Why does it matter?
Our customer is planning a LED control using the device.
LED's Vf, Ic and Vce(sat) are important information for design.

By the way, I posted anather question in this forum.
e2e.ti.com/.../523301

Could you answer it?

Best regards,
Nagai

Nagai-san,

How many channels are needed; what is the LED supply voltage?
For low current and low VOL, ULN2003V12 is a good choice, but it is 7 channel device.

Ronald-san,

Currently, Our customer uses competitor's 8-channels device.
ULN2803A is pin compatible to it.

LED supply voltage is unknown.
Supply voltage and current limiting resistance are will be determined in a few days.

Regards,
Nagai